2007-01-25 07:40:21 +01:00
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/*
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* ircd-ratbox: A slightly useful ircd.
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* commio.c: Network/file related functions
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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2007-04-03 11:21:31 +02:00
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* $Id: commio.c 3354 2007-04-03 09:21:31Z nenolod $
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2007-01-25 07:40:21 +01:00
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*/
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#include "libcharybdis.h"
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#ifndef IN_LOOPBACKNET
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#define IN_LOOPBACKNET 0x7f
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#endif
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#ifndef INADDR_NONE
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#define INADDR_NONE ((unsigned int) 0xffffffff)
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#endif
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const char *const NONB_ERROR_MSG = "set_non_blocking failed for %s:%s";
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const char *const SETBUF_ERROR_MSG = "set_sock_buffers failed for server %s:%s";
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static const char *comm_err_str[] = { "Comm OK", "Error during bind()",
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"Error during DNS lookup", "connect timeout",
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"Error during connect()",
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"Comm Error"
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};
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2007-03-05 18:23:07 +01:00
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#define FD_HASH_SIZE 128
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static dlink_list fd_table[FD_HASH_SIZE];
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2007-01-25 07:40:21 +01:00
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static void fdlist_update_biggest(int fd, int opening);
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/* Highest FD and number of open FDs .. */
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int highest_fd = -1; /* Its -1 because we haven't started yet -- adrian */
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int number_fd = 0;
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static void comm_connect_callback(int fd, int status);
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static PF comm_connect_timeout;
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static void comm_connect_dns_callback(void *vptr, struct DNSReply *reply);
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static PF comm_connect_tryconnect;
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2007-04-03 11:21:31 +02:00
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static int comm_max_connections = 0;
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2007-01-25 07:40:21 +01:00
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2007-03-05 18:23:07 +01:00
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inline fde_t *
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comm_locate_fd(int fd)
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{
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int bucket = fd % FD_HASH_SIZE;
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dlink_list *list = &fd_table[bucket];
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dlink_node *n;
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DLINK_FOREACH(n, list->head)
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{
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fde_t *F = (fde_t *) n->data;
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if (F->fd == fd)
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return F;
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}
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return NULL;
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}
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inline fde_t *
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comm_add_fd(int fd)
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{
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fde_t *F = comm_locate_fd(fd);
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dlink_list *list;
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if (F != NULL)
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return F;
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2007-12-22 23:05:51 +01:00
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F = MyMalloc(sizeof(fde_t));
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2007-03-05 18:23:07 +01:00
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F->fd = fd;
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2007-12-22 23:05:51 +01:00
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F->read_impl = read;
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F->write_impl = write;
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2007-03-05 18:23:07 +01:00
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list = &fd_table[fd % FD_HASH_SIZE];
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dlinkAdd(F, &F->node, list);
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return F;
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}
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inline void
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comm_remove_fd(int fd)
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{
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int bucket = fd % FD_HASH_SIZE;
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fde_t *F;
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dlink_list *list = &fd_table[bucket];
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F = comm_locate_fd(fd);
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if (F == NULL)
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return;
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dlinkDelete(&F->node, list);
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MyFree(F);
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}
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2007-01-25 07:40:21 +01:00
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/* 32bit solaris is kinda slow and stdio only supports fds < 256
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* so we got to do this crap below.
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* (BTW Fuck you Sun, I hate your guts and I hope you go bankrupt soon)
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2007-03-05 18:23:07 +01:00
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* XXX: this is no longer needed in Solaris 10. --nenolod
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2007-01-25 07:40:21 +01:00
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*/
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#if defined (__SVR4) && defined (__sun)
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static void comm_fd_hack(int *fd)
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{
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int newfd;
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if(*fd > 256 || *fd < 0)
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return;
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if((newfd = fcntl(*fd, F_DUPFD, 256)) != -1)
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{
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close(*fd);
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*fd = newfd;
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}
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return;
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}
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#else
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#define comm_fd_hack(fd)
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#endif
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/* close_all_connections() can be used *before* the system come up! */
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void
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comm_close_all(void)
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{
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int i;
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#ifndef NDEBUG
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int fd;
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#endif
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2007-04-03 11:21:31 +02:00
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/*
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* we start at 4 to avoid giving fds where malloc messages
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* could be written --nenolod
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*/
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for (i = 4; i < comm_max_connections; ++i)
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2007-01-25 07:40:21 +01:00
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{
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2007-03-05 18:23:07 +01:00
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fde_t *F = comm_locate_fd(i);
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if(F != NULL && F->flags.open)
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2007-01-25 07:40:21 +01:00
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comm_close(i);
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else
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close(i);
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}
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/* XXX should his hack be done in all cases? */
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#ifndef NDEBUG
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/* fugly hack to reserve fd == 2 */
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(void) close(2);
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fd = open("stderr.log", O_WRONLY | O_CREAT | O_APPEND, 0644);
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if(fd >= 0)
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{
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dup2(fd, 2);
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close(fd);
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}
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#endif
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}
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/*
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* get_sockerr - get the error value from the socket or the current errno
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*
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* Get the *real* error from the socket (well try to anyway..).
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* This may only work when SO_DEBUG is enabled but its worth the
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* gamble anyway.
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*/
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int
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comm_get_sockerr(int fd)
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{
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int errtmp = errno;
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#ifdef SO_ERROR
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int err = 0;
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socklen_t len = sizeof(err);
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if(-1 < fd && !getsockopt(fd, SOL_SOCKET, SO_ERROR, (char *) &err, (socklen_t *) & len))
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{
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if(err)
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errtmp = err;
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}
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errno = errtmp;
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#endif
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return errtmp;
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}
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/*
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* set_sock_buffers - set send and receive buffers for socket
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*
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* inputs - fd file descriptor
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* - size to set
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* output - returns true (1) if successful, false (0) otherwise
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* side effects -
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*/
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int
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comm_set_buffers(int fd, int size)
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{
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if(setsockopt
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(fd, SOL_SOCKET, SO_RCVBUF, (char *) &size, sizeof(size))
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|| setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (char *) &size, sizeof(size)))
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return 0;
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return 1;
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}
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/*
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* set_non_blocking - Set the client connection into non-blocking mode.
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*
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* inputs - fd to set into non blocking mode
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* output - 1 if successful 0 if not
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* side effects - use POSIX compliant non blocking and
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* be done with it.
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*/
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int
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comm_set_nb(int fd)
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{
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int nonb = 0;
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int res;
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2007-03-05 18:23:07 +01:00
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fde_t *F = comm_locate_fd(fd);
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2007-01-25 07:40:21 +01:00
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nonb |= O_NONBLOCK;
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res = fcntl(fd, F_GETFL, 0);
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if(-1 == res || fcntl(fd, F_SETFL, res | nonb) == -1)
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return 0;
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2007-03-05 18:23:07 +01:00
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if (F != NULL)
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F->flags.nonblocking = 1;
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2007-01-25 07:40:21 +01:00
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return 1;
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}
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/*
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* stolen from squid - its a neat (but overused! :) routine which we
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* can use to see whether we can ignore this errno or not. It is
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* generally useful for non-blocking network IO related errnos.
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* -- adrian
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*/
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int
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ignoreErrno(int ierrno)
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{
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switch (ierrno)
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{
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case EINPROGRESS:
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case EWOULDBLOCK:
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#if EAGAIN != EWOULDBLOCK
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case EAGAIN:
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#endif
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case EALREADY:
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case EINTR:
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#ifdef ERESTART
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case ERESTART:
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#endif
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return 1;
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default:
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return 0;
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}
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}
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/*
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* comm_settimeout() - set the socket timeout
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*
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* Set the timeout for the fd
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*/
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void
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comm_settimeout(int fd, time_t timeout, PF * callback, void *cbdata)
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{
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fde_t *F;
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s_assert(fd >= 0);
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2007-03-05 18:23:07 +01:00
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F = comm_locate_fd(fd);
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2007-01-25 07:40:21 +01:00
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s_assert(F->flags.open);
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F->timeout = CurrentTime + (timeout / 1000);
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F->timeout_handler = callback;
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F->timeout_data = cbdata;
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}
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/*
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* comm_setflush() - set a flush function
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*
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* A flush function is simply a function called if found during
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* comm_timeouts(). Its basically a second timeout, except in this case
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* I'm too lazy to implement multiple timeout functions! :-)
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* its kinda nice to have it seperate, since this is designed for
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* flush functions, and when comm_close() is implemented correctly
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* with close functions, we _actually_ don't call comm_close() here ..
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*/
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void
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comm_setflush(int fd, time_t timeout, PF * callback, void *cbdata)
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{
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fde_t *F;
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s_assert(fd >= 0);
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2007-03-05 18:23:07 +01:00
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F = comm_locate_fd(fd);
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2007-01-25 07:40:21 +01:00
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s_assert(F->flags.open);
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F->flush_timeout = CurrentTime + (timeout / 1000);
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F->flush_handler = callback;
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F->flush_data = cbdata;
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}
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/*
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* comm_checktimeouts() - check the socket timeouts
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*
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* All this routine does is call the given callback/cbdata, without closing
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* down the file descriptor. When close handlers have been implemented,
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* this will happen.
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*/
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void
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comm_checktimeouts(void *notused)
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{
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PF *hdl;
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void *data;
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fde_t *F;
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2007-03-05 18:31:35 +01:00
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dlink_list *bucket;
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int i;
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dlink_node *n, *n2;
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2007-03-05 18:35:17 +01:00
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for (i = 0; i <= FD_HASH_SIZE; i++)
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2007-01-25 07:40:21 +01:00
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{
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2007-03-05 18:31:35 +01:00
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bucket = &fd_table[i];
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2007-01-25 07:40:21 +01:00
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2007-03-05 18:31:35 +01:00
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if (dlink_list_length(bucket) <= 0)
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continue;
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2007-01-25 07:40:21 +01:00
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2007-03-05 18:31:35 +01:00
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DLINK_FOREACH_SAFE(n, n2, bucket->head)
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2007-01-25 07:40:21 +01:00
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{
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2007-03-05 18:31:35 +01:00
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F = (fde_t *) n->data;
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if(F == NULL)
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continue;
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if(!F->flags.open)
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continue;
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if(F->flags.closing)
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continue;
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/* check flush functions */
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if(F->flush_handler &&
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F->flush_timeout > 0 && F->flush_timeout < CurrentTime)
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{
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hdl = F->flush_handler;
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data = F->flush_data;
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comm_setflush(F->fd, 0, NULL, NULL);
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hdl(F->fd, data);
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}
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/* check timeouts */
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if(F->timeout_handler &&
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F->timeout > 0 && F->timeout < CurrentTime)
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{
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/* Call timeout handler */
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hdl = F->timeout_handler;
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data = F->timeout_data;
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comm_settimeout(F->fd, 0, NULL, NULL);
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hdl(F->fd, data);
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}
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2007-01-25 07:40:21 +01:00
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}
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}
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}
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/*
|
|
|
|
* void comm_connect_tcp(int fd, const char *host, u_short port,
|
|
|
|
* struct sockaddr *clocal, int socklen,
|
|
|
|
* CNCB *callback, void *data, int aftype, int timeout)
|
|
|
|
* Input: An fd to connect with, a host and port to connect to,
|
|
|
|
* a local sockaddr to connect from + length(or NULL to use the
|
|
|
|
* default), a callback, the data to pass into the callback, the
|
|
|
|
* address family.
|
|
|
|
* Output: None.
|
|
|
|
* Side-effects: A non-blocking connection to the host is started, and
|
|
|
|
* if necessary, set up for selection. The callback given
|
|
|
|
* may be called now, or it may be called later.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
comm_connect_tcp(int fd, const char *host, u_short port,
|
|
|
|
struct sockaddr *clocal, int socklen, CNCB * callback,
|
|
|
|
void *data, int aftype, int timeout)
|
|
|
|
{
|
|
|
|
void *ipptr = NULL;
|
|
|
|
fde_t *F;
|
|
|
|
s_assert(fd >= 0);
|
2007-03-05 18:23:07 +01:00
|
|
|
F = comm_locate_fd(fd);
|
2007-01-25 07:40:21 +01:00
|
|
|
F->flags.called_connect = 1;
|
|
|
|
s_assert(callback);
|
|
|
|
F->connect.callback = callback;
|
|
|
|
F->connect.data = data;
|
|
|
|
|
|
|
|
memset(&F->connect.hostaddr, 0, sizeof(F->connect.hostaddr));
|
|
|
|
#ifdef IPV6
|
|
|
|
if(aftype == AF_INET6)
|
|
|
|
{
|
|
|
|
struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)&F->connect.hostaddr;
|
|
|
|
SET_SS_LEN(F->connect.hostaddr, sizeof(struct sockaddr_in6));
|
|
|
|
in6->sin6_port = htons(port);
|
|
|
|
in6->sin6_family = AF_INET6;
|
|
|
|
ipptr = &in6->sin6_addr;
|
|
|
|
} else
|
|
|
|
#endif
|
|
|
|
{
|
|
|
|
struct sockaddr_in *in = (struct sockaddr_in *)&F->connect.hostaddr;
|
|
|
|
SET_SS_LEN(F->connect.hostaddr, sizeof(struct sockaddr_in));
|
|
|
|
in->sin_port = htons(port);
|
|
|
|
in->sin_family = AF_INET;
|
|
|
|
ipptr = &in->sin_addr;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Note that we're using a passed sockaddr here. This is because
|
|
|
|
* generally you'll be bind()ing to a sockaddr grabbed from
|
|
|
|
* getsockname(), so this makes things easier.
|
|
|
|
* XXX If NULL is passed as local, we should later on bind() to the
|
|
|
|
* virtual host IP, for completeness.
|
|
|
|
* -- adrian
|
|
|
|
*/
|
|
|
|
if((clocal != NULL) && (bind(F->fd, clocal, socklen) < 0))
|
|
|
|
{
|
|
|
|
/* Failure, call the callback with COMM_ERR_BIND */
|
|
|
|
comm_connect_callback(F->fd, COMM_ERR_BIND);
|
|
|
|
/* ... and quit */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Next, if we have been given an IP, get the addr and skip the
|
|
|
|
* DNS check (and head direct to comm_connect_tryconnect().
|
|
|
|
*/
|
|
|
|
if(inetpton(aftype, host, ipptr) <= 0)
|
|
|
|
{
|
|
|
|
/* Send the DNS request, for the next level */
|
|
|
|
F->dns_query = MyMalloc(sizeof(struct DNSQuery));
|
|
|
|
F->dns_query->ptr = F;
|
|
|
|
F->dns_query->callback = comm_connect_dns_callback;
|
|
|
|
#ifdef IPV6
|
|
|
|
if (aftype == AF_INET6)
|
|
|
|
gethost_byname_type(host, F->dns_query, T_AAAA);
|
|
|
|
else
|
|
|
|
#endif
|
|
|
|
gethost_byname_type(host, F->dns_query, T_A);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We have a valid IP, so we just call tryconnect */
|
|
|
|
/* Make sure we actually set the timeout here .. */
|
|
|
|
comm_settimeout(F->fd, timeout * 1000, comm_connect_timeout, NULL);
|
|
|
|
comm_connect_tryconnect(F->fd, NULL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_connect_callback() - call the callback, and continue with life
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
comm_connect_callback(int fd, int status)
|
|
|
|
{
|
|
|
|
CNCB *hdl;
|
2007-03-05 18:23:07 +01:00
|
|
|
fde_t *F = comm_locate_fd(fd);
|
|
|
|
|
2007-01-25 07:40:21 +01:00
|
|
|
/* This check is gross..but probably necessary */
|
2007-03-05 18:23:07 +01:00
|
|
|
if(F == NULL || F->connect.callback == NULL)
|
2007-01-25 07:40:21 +01:00
|
|
|
return;
|
2007-03-05 18:23:07 +01:00
|
|
|
|
2007-01-25 07:40:21 +01:00
|
|
|
/* Clear the connect flag + handler */
|
|
|
|
hdl = F->connect.callback;
|
|
|
|
F->connect.callback = NULL;
|
|
|
|
F->flags.called_connect = 0;
|
|
|
|
|
|
|
|
/* Clear the timeout handler */
|
|
|
|
comm_settimeout(F->fd, 0, NULL, NULL);
|
|
|
|
|
|
|
|
/* Call the handler */
|
|
|
|
hdl(F->fd, status, F->connect.data);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_connect_timeout() - this gets called when the socket connection
|
|
|
|
* times out. This *only* can be called once connect() is initially
|
|
|
|
* called ..
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
comm_connect_timeout(int fd, void *notused)
|
|
|
|
{
|
|
|
|
/* error! */
|
|
|
|
comm_connect_callback(fd, COMM_ERR_TIMEOUT);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_connect_dns_callback() - called at the completion of the DNS request
|
|
|
|
*
|
|
|
|
* The DNS request has completed, so if we've got an error, return it,
|
|
|
|
* otherwise we initiate the connect()
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
comm_connect_dns_callback(void *vptr, struct DNSReply *reply)
|
|
|
|
{
|
|
|
|
fde_t *F = vptr;
|
|
|
|
|
|
|
|
/* Free dns_query now to avoid double reslist free -- jilles */
|
|
|
|
MyFree(F->dns_query);
|
|
|
|
F->dns_query = NULL;
|
|
|
|
|
|
|
|
if(!reply)
|
|
|
|
{
|
|
|
|
comm_connect_callback(F->fd, COMM_ERR_DNS);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* No error, set a 10 second timeout */
|
|
|
|
comm_settimeout(F->fd, 30 * 1000, comm_connect_timeout, NULL);
|
|
|
|
|
|
|
|
/* Copy over the DNS reply info so we can use it in the connect() */
|
|
|
|
#ifdef IPV6
|
|
|
|
if(reply->addr.ss_family == AF_INET6)
|
|
|
|
{
|
|
|
|
struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)&F->connect.hostaddr;
|
|
|
|
memcpy(&in6->sin6_addr, &((struct sockaddr_in6 *)&reply->addr)->sin6_addr, sizeof(struct in6_addr));
|
|
|
|
}
|
|
|
|
else
|
|
|
|
#endif
|
|
|
|
{
|
|
|
|
struct sockaddr_in *in = (struct sockaddr_in *)&F->connect.hostaddr;
|
|
|
|
in->sin_addr.s_addr = ((struct sockaddr_in *)&reply->addr)->sin_addr.s_addr;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now, call the tryconnect() routine to try a connect() */
|
|
|
|
comm_connect_tryconnect(F->fd, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* static void comm_connect_tryconnect(int fd, void *notused)
|
|
|
|
* Input: The fd, the handler data(unused).
|
|
|
|
* Output: None.
|
|
|
|
* Side-effects: Try and connect with pending connect data for the FD. If
|
|
|
|
* we succeed or get a fatal error, call the callback.
|
|
|
|
* Otherwise, it is still blocking or something, so register
|
|
|
|
* to select for a write event on this FD.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
comm_connect_tryconnect(int fd, void *notused)
|
|
|
|
{
|
|
|
|
int retval;
|
2007-03-05 18:23:07 +01:00
|
|
|
fde_t *F = comm_locate_fd(fd);
|
2007-01-25 07:40:21 +01:00
|
|
|
|
|
|
|
if(F->connect.callback == NULL)
|
|
|
|
return;
|
|
|
|
/* Try the connect() */
|
2007-03-05 18:23:07 +01:00
|
|
|
retval = connect(fd, (struct sockaddr *) &F->connect.hostaddr,
|
|
|
|
GET_SS_LEN(F->connect.hostaddr));
|
2007-01-25 07:40:21 +01:00
|
|
|
/* Error? */
|
|
|
|
if(retval < 0)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* If we get EISCONN, then we've already connect()ed the socket,
|
|
|
|
* which is a good thing.
|
|
|
|
* -- adrian
|
|
|
|
*/
|
|
|
|
if(errno == EISCONN)
|
|
|
|
comm_connect_callback(F->fd, COMM_OK);
|
|
|
|
else if(ignoreErrno(errno))
|
|
|
|
/* Ignore error? Reschedule */
|
|
|
|
comm_setselect(F->fd, FDLIST_SERVER, COMM_SELECT_WRITE|COMM_SELECT_RETRY,
|
|
|
|
comm_connect_tryconnect, NULL, 0);
|
|
|
|
else
|
|
|
|
/* Error? Fail with COMM_ERR_CONNECT */
|
|
|
|
comm_connect_callback(F->fd, COMM_ERR_CONNECT);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* If we get here, we've suceeded, so call with COMM_OK */
|
|
|
|
comm_connect_callback(F->fd, COMM_OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_error_str() - return an error string for the given error condition
|
|
|
|
*/
|
|
|
|
const char *
|
|
|
|
comm_errstr(int error)
|
|
|
|
{
|
|
|
|
if(error < 0 || error >= COMM_ERR_MAX)
|
|
|
|
return "Invalid error number!";
|
|
|
|
return comm_err_str[error];
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_socket() - open a socket
|
|
|
|
*
|
|
|
|
* This is a highly highly cut down version of squid's comm_open() which
|
|
|
|
* for the most part emulates socket(), *EXCEPT* it fails if we're about
|
|
|
|
* to run out of file descriptors.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
comm_socket(int family, int sock_type, int proto, const char *note)
|
|
|
|
{
|
|
|
|
int fd;
|
|
|
|
/* First, make sure we aren't going to run out of file descriptors */
|
2007-04-03 11:21:31 +02:00
|
|
|
if(number_fd >= comm_max_connections)
|
2007-01-25 07:40:21 +01:00
|
|
|
{
|
|
|
|
errno = ENFILE;
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Next, we try to open the socket. We *should* drop the reserved FD
|
|
|
|
* limit if/when we get an error, but we can deal with that later.
|
|
|
|
* XXX !!! -- adrian
|
|
|
|
*/
|
|
|
|
fd = socket(family, sock_type, proto);
|
|
|
|
comm_fd_hack(&fd);
|
|
|
|
if(fd < 0)
|
|
|
|
return -1; /* errno will be passed through, yay.. */
|
|
|
|
|
|
|
|
#if defined(IPV6) && defined(IPV6_V6ONLY)
|
|
|
|
/*
|
|
|
|
* Make sure we can take both IPv4 and IPv6 connections
|
|
|
|
* on an AF_INET6 socket
|
|
|
|
*/
|
|
|
|
if(family == AF_INET6)
|
|
|
|
{
|
|
|
|
int off = 1;
|
|
|
|
if(setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &off, sizeof(off)) == -1)
|
|
|
|
{
|
|
|
|
libcharybdis_log("comm_socket: Could not set IPV6_V6ONLY option to 1 on FD %d: %s",
|
|
|
|
fd, strerror(errno));
|
|
|
|
close(fd);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Set the socket non-blocking, and other wonderful bits */
|
|
|
|
if(!comm_set_nb(fd))
|
|
|
|
{
|
|
|
|
libcharybdis_log("comm_open: Couldn't set FD %d non blocking: %s", fd, strerror(errno));
|
|
|
|
close(fd);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Next, update things in our fd tracking */
|
|
|
|
comm_open(fd, FD_SOCKET, note);
|
|
|
|
return fd;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_accept() - accept an incoming connection
|
|
|
|
*
|
|
|
|
* This is a simple wrapper for accept() which enforces FD limits like
|
|
|
|
* comm_open() does.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
comm_accept(int fd, struct sockaddr *pn, socklen_t *addrlen)
|
|
|
|
{
|
|
|
|
int newfd;
|
2007-04-03 11:21:31 +02:00
|
|
|
if(number_fd >= comm_max_connections)
|
2007-01-25 07:40:21 +01:00
|
|
|
{
|
|
|
|
errno = ENFILE;
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Next, do the accept(). if we get an error, we should drop the
|
|
|
|
* reserved fd limit, but we can deal with that when comm_open()
|
|
|
|
* also does it. XXX -- adrian
|
|
|
|
*/
|
|
|
|
newfd = accept(fd, (struct sockaddr *) pn, addrlen);
|
|
|
|
comm_fd_hack(&newfd);
|
|
|
|
|
|
|
|
if(newfd < 0)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* Set the socket non-blocking, and other wonderful bits */
|
|
|
|
if(!comm_set_nb(newfd))
|
|
|
|
{
|
|
|
|
libcharybdis_log("comm_accept: Couldn't set FD %d non blocking!", newfd);
|
|
|
|
close(newfd);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Next, tag the FD as an incoming connection */
|
|
|
|
comm_open(newfd, FD_SOCKET, "Incoming connection");
|
|
|
|
|
|
|
|
/* .. and return */
|
|
|
|
return newfd;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If a sockaddr_storage is AF_INET6 but is a mapped IPv4
|
|
|
|
* socket manged the sockaddr.
|
|
|
|
*/
|
|
|
|
#ifndef mangle_mapped_sockaddr
|
|
|
|
void
|
|
|
|
mangle_mapped_sockaddr(struct sockaddr *in)
|
|
|
|
{
|
|
|
|
struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in;
|
|
|
|
|
|
|
|
if(in->sa_family == AF_INET)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if(in->sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&in6->sin6_addr))
|
|
|
|
{
|
|
|
|
struct sockaddr_in in4;
|
|
|
|
memset(&in4, 0, sizeof(struct sockaddr_in));
|
|
|
|
in4.sin_family = AF_INET;
|
|
|
|
in4.sin_port = in6->sin6_port;
|
|
|
|
in4.sin_addr.s_addr = ((uint32_t *)&in6->sin6_addr)[3];
|
|
|
|
memcpy(in, &in4, sizeof(struct sockaddr_in));
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
fdlist_update_biggest(int fd, int opening)
|
|
|
|
{
|
|
|
|
if(fd < highest_fd)
|
|
|
|
return;
|
2007-04-03 11:21:31 +02:00
|
|
|
s_assert(fd < comm_max_connections);
|
2007-01-25 07:40:21 +01:00
|
|
|
|
|
|
|
if(fd > highest_fd)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* s_assert that we are not closing a FD bigger than
|
|
|
|
* our known biggest FD
|
|
|
|
*/
|
|
|
|
s_assert(opening);
|
|
|
|
highest_fd = fd;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* if we are here, then fd == Biggest_FD */
|
|
|
|
/*
|
|
|
|
* s_assert that we are closing the biggest FD; we can't be
|
|
|
|
* re-opening it
|
|
|
|
*/
|
|
|
|
s_assert(!opening);
|
2007-03-05 19:42:24 +01:00
|
|
|
while (highest_fd >= 0 && comm_locate_fd(fd) != NULL)
|
2007-01-25 07:40:21 +01:00
|
|
|
highest_fd--;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
fdlist_init(void)
|
|
|
|
{
|
|
|
|
static int initialized = 0;
|
2007-04-03 11:21:31 +02:00
|
|
|
struct rlimit limit;
|
2007-01-25 07:40:21 +01:00
|
|
|
|
|
|
|
if(!initialized)
|
|
|
|
{
|
2007-03-05 18:23:07 +01:00
|
|
|
memset(&fd_table, '\0', sizeof(dlink_list) * FD_HASH_SIZE);
|
2007-04-03 11:21:31 +02:00
|
|
|
|
|
|
|
/* set up comm_max_connections. */
|
|
|
|
if(!getrlimit(RLIMIT_NOFILE, &limit))
|
|
|
|
comm_max_connections = limit.rlim_cur;
|
|
|
|
|
2007-01-25 07:40:21 +01:00
|
|
|
initialized = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called to open a given filedescriptor */
|
|
|
|
void
|
|
|
|
comm_open(int fd, unsigned int type, const char *desc)
|
|
|
|
{
|
2007-03-05 18:23:07 +01:00
|
|
|
fde_t *F = comm_add_fd(fd);
|
2007-01-25 07:40:21 +01:00
|
|
|
s_assert(fd >= 0);
|
|
|
|
|
|
|
|
if(F->flags.open)
|
|
|
|
{
|
|
|
|
comm_close(fd);
|
|
|
|
}
|
|
|
|
s_assert(!F->flags.open);
|
|
|
|
F->fd = fd;
|
|
|
|
F->type = type;
|
|
|
|
F->flags.open = 1;
|
|
|
|
#ifdef NOTYET
|
|
|
|
F->defer.until = 0;
|
|
|
|
F->defer.n = 0;
|
|
|
|
F->defer.handler = NULL;
|
|
|
|
#endif
|
|
|
|
fdlist_update_biggest(fd, 1);
|
|
|
|
F->comm_index = -1;
|
|
|
|
F->list = FDLIST_NONE;
|
|
|
|
if(desc)
|
|
|
|
strlcpy(F->desc, desc, sizeof(F->desc));
|
|
|
|
number_fd++;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Called to close a given filedescriptor */
|
|
|
|
void
|
|
|
|
comm_close(int fd)
|
|
|
|
{
|
2007-03-05 18:23:07 +01:00
|
|
|
fde_t *F = comm_locate_fd(fd);
|
2007-01-25 07:40:21 +01:00
|
|
|
s_assert(F->flags.open);
|
|
|
|
/* All disk fd's MUST go through file_close() ! */
|
|
|
|
s_assert(F->type != FD_FILE);
|
|
|
|
if(F->type == FD_FILE)
|
|
|
|
{
|
|
|
|
s_assert(F->read_handler == NULL);
|
|
|
|
s_assert(F->write_handler == NULL);
|
|
|
|
}
|
|
|
|
comm_setselect(F->fd, FDLIST_NONE, COMM_SELECT_WRITE | COMM_SELECT_READ, NULL, NULL, 0);
|
|
|
|
comm_setflush(F->fd, 0, NULL, NULL);
|
2007-03-05 18:41:40 +01:00
|
|
|
F->timeout = 0;
|
2007-01-25 07:40:21 +01:00
|
|
|
|
|
|
|
if (F->dns_query != NULL)
|
|
|
|
{
|
|
|
|
delete_resolver_queries(F->dns_query);
|
|
|
|
MyFree(F->dns_query);
|
|
|
|
F->dns_query = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
F->flags.open = 0;
|
|
|
|
fdlist_update_biggest(fd, 0);
|
|
|
|
number_fd--;
|
2007-03-05 18:23:07 +01:00
|
|
|
comm_remove_fd(fd);
|
|
|
|
|
2007-01-25 07:40:21 +01:00
|
|
|
/* Unlike squid, we're actually closing the FD here! -- adrian */
|
|
|
|
close(fd);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_dump() - dump the list of active filedescriptors
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
comm_dump(struct Client *source_p)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2007-03-05 18:23:07 +01:00
|
|
|
for (i = 0; i <= FD_HASH_SIZE; i++)
|
2007-01-25 07:40:21 +01:00
|
|
|
{
|
2007-03-05 18:23:07 +01:00
|
|
|
dlink_node *n;
|
|
|
|
|
|
|
|
if (dlink_list_length(&fd_table[i]) <= 0)
|
2007-01-25 07:40:21 +01:00
|
|
|
continue;
|
|
|
|
|
2007-03-05 18:23:07 +01:00
|
|
|
DLINK_FOREACH(n, fd_table[i].head)
|
|
|
|
{
|
|
|
|
fde_t *F = (fde_t *) n->data;
|
|
|
|
|
|
|
|
if(F == NULL || !F->flags.open)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
sendto_one_numeric(source_p, RPL_STATSDEBUG,
|
|
|
|
"F :fd %-3d bucket %-3d desc '%s'",
|
|
|
|
F->fd, i, F->desc);
|
|
|
|
}
|
2007-01-25 07:40:21 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* comm_note() - set the fd note
|
|
|
|
*
|
|
|
|
* Note: must be careful not to overflow fd_table[fd].desc when
|
|
|
|
* calling.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
comm_note(int fd, const char *format, ...)
|
|
|
|
{
|
|
|
|
va_list args;
|
2007-03-05 18:23:07 +01:00
|
|
|
fde_t *F = comm_add_fd(fd); /* XXX: epoll, kqueue. */
|
2007-01-25 07:40:21 +01:00
|
|
|
|
|
|
|
if(format)
|
|
|
|
{
|
|
|
|
va_start(args, format);
|
2007-03-05 18:23:07 +01:00
|
|
|
ircvsnprintf(F->desc, FD_DESC_SZ, format, args);
|
2007-01-25 07:40:21 +01:00
|
|
|
va_end(args);
|
|
|
|
}
|
|
|
|
else
|
2007-03-05 18:23:07 +01:00
|
|
|
F->desc[0] = '\0';
|
2007-01-25 07:40:21 +01:00
|
|
|
}
|
|
|
|
|
2007-04-03 11:21:31 +02:00
|
|
|
extern int
|
|
|
|
comm_get_maxconnections(void)
|
|
|
|
{
|
|
|
|
fdlist_init();
|
2007-01-25 07:40:21 +01:00
|
|
|
|
2007-04-03 11:21:31 +02:00
|
|
|
return comm_max_connections;
|
|
|
|
}
|